Table 1 lists the time of numerical factorization between GSS and PARDISO. PARDISO’ s version is from Intel Composer XE 2013 SP1. GSS 2.4 use CPU-GPU hybrid computing. The testing CPU is INTEL Core i7-4770(3.4GHz) with 24G memory. The graphics card is ASUS GTX780 (with compute capability 3.5). NVIDIA CUDA Toolkit is 5.5. The operating system is Windows 7 64. Both solvers use default parameters.

For large matrices need long time computing, GSS 2.4 is Nearly 3 times faster than PARDISO. For matrices need short time computing, PARDISO is faster than GSS. One reason is that complex synchronization between CPU/GPU do need some extra time.